German NIWI-operation 1940 Belgium (2nd try)

[fredcompa]

Hello to everyone!
Here's again a demand for information about above mentioned operation:
on May 10th 1940 some 100 Fiessler Storch's landed behind the Belgian lines of the " Chasseurs Ardennais" .
At the landing about 30 aircrafts were destroyed and several Luftwaffe pilots were K.I.A. The operation was called NIWI but among the German participants they called it " Operation Nicht-Wissen".
Up to now I found very very little information on this Op., it's almost amazing!
Who can help us with the losses and crews ? Your help would kindly be appreciated !
fredcompa